US 5th Air Force bombers attack Japanese bases at Lae, New Guinea, and Rabaul, New Britain.

At 9.50 AM 12 miles off the coast of Brazil, U-507 sinks Swedish MV Hammaren with the deck gun and 5 torpedoes (6 dead, 25 survivors in 1 lifeboat reach Brazil). Brazil declares war on Germany due to these attacks in Brazilian waters by U-507 that have killed over 600 people from neutral countries in a week.

Case Blue. At midday, pontoon bridges begin carrying German 16th Panzer Division across the River Don. The way to the Volga and Stalingrad lies open. In the Black Sea, Soviet submarine M3 disappears near Odessa, Ukraine, presumably sunk on a German mine.

Caribbean. In the afternoon, 185 miles North of the Panama Canal, a Douglas B-18 Bolo bomber (US 45th Bombardment Squadron, from Howard Field in the Canal Zone) spots U-654 running at periscope depth and sinks her with depth charges (all 44 hands lost).